U.S. officials have recovered a panel that blew off an Alaska Airlines (ALK.N) airliner triggering a partial grounding of Boeing's 737 MAX 9 and sending shares in the planemaker tumbling on Monday, APA reports citing Reuters.
A door plug tore off on Friday (ALK.N) following takeoff from Portland, Oregon, en route to Ontario, California, depressurizing the plane and forcing pilots to turn back.
The plane, with 171 passengers and six crew on board, landed safely.
The U.S. Federal Aviation Administration (FAA) on Saturday ordered the temporary grounding of 171 Boeing MAX 9 jets installed with the same panel, which weighs about 60 pounds (27 kg) and covers an optional exit door.
It was recovered on Sunday by a Portland school teacher identified only as "Bob" in the Cedar Hills neighborhood who found it in his backyard, U.S. National Transportation Safety Board (NTSB) Chair Jennifer Homendy said.
She said she was "very relieved" it had been found having called it a "key missing component" to determine why the accident occurred.
"Our structures team will want to look at everything on the door - all of the components on the door to see, to look at, witness marks, to look at any paint transfer, what shape the door was in when found. That can tell them a lot about what occurred," she said.
The force from the loss of the panel was strong enough to blow open the cockpit door during flight, said Homendy, adding that it must have been a "terrifying event" to experience.
"They heard a bang," Homendy said of the pilots, who were interviewed by investigators.
Homendy said the cockpit voice recorder did not capture any data because it had been overwritten. She again called on regulators to mandate retrofitting existing planes with recorders that capture 25 hours of data, up from the two hours required in the U.S. at present.
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